[LeonM]

Thanks for the link, looks like there are some good tips on there! I'll try it out tonight.

One of the problems I've ran into is that my external 4k monitor (40") runs at 100% scaling and my laptop 4k monitor at 200%, which causes all sorts of rendering bugs. After some searching I found that this has nothing to do with the X1E or Ubuntu for that matter. It's a X11/Wayland issue that just isn't properly implemented yet.

Edit: it looks like this guide also instructs to switch to 'discrete graphics' in the BIOS. This is a hack and not what you want. This causes the nVidia graphics chip to be always on (instead of letting the OS choose). This causes terrible battery life. Don't do that.